CN205039009U - Category 3 data cable - Google Patents

Abstract

The utility model discloses a category 3 data cable belongs to the data cable, and current category 3 data cable transmission performance is not good, the utility model discloses a strand six stranding subunits and form at six stranding subunit outside parcel oversheaths around a center pair, the center pair externally wraps up the inner sheath at a stranded conductor to constitute, the stranded conductor is to being formed by two insulated conductors transposition, and insulated conductors wraps up the insulating layer to constitute outside the copper conductor, the stranding subunit comprises four stranded conductor strands, constitutes the insulating layer that four right insulated conductors of stranded conductor have different colors, the typewriter ribbon of the different colors of winding on six stranding subunits. 6 have the pitch of two sets of differences in the individual stranding subunit, ranges is alternated each other to different pitches when total stranding, can effectively avoid the crosstalk interference of between wire pair, has stablized other electric transmission performance, like characteristic impedance, return loss, near -end crosstalk has simplified the production technology.

Description

A kind of large logarithmic data cable

Technical field

The utility model belongs to data cable, specifically a kind of large logarithmic data cable.Be mainly used in base station backbone, solve the mutual interference between data transmission procedure center line pair and the impedance mismatch that causes because structural design is unreasonable and the signal reflex that causes, cause data distortion or loss.

Background technology

Data cable is the communication medium that the wide model of a kind of Access Network is applied to community, office building, the external or internal information communication of enterprises and institutions.The environment for use of data cable becomes complicated and changeable, applied environment is not only confined to pipeline and ground, ceiling lay, also may be used under water, the environment such as corridor, in-plantly various optical cable need be touched during construction wiring, the situations such as the interference be subject to are all the more serious, can cause message interrupts time serious.So stronger anti-interference and stable transmission performance just must be had as backbone cable.

25 couple in the market surpasses 5 class data cables, substantially the electrical performance demands that international or domestic standard specifies can not all be met completely, as near-end crosstalk attenuation (be called for short: NEXT), characteristic impedance (be called for short: Zc), return loss (be called for short: RL), the requirement that the standard that can not reach specifies.Cause failure or the unstable properties of NEXT, Zc and RL, reasonability, the selecting of moulds of industrial equipment of main and technological design have direct relation with equipment.

Wherein: the meaning of large logarithm and multipair number, mean that a lot of cable in pairs forms a wisp, then form a bale (cable of larger logarithm then forms a larger cable by bale one bale again) by a lot of wisp.Data cable is mainly be applicable to the wiring cable in building communication wires system between workspace communication exit and handing-over between distributing frame, and the wiring cable in comprehensive wiring system between telex network exit to distributing frame.Near-end crosstalk attenuation (NEXT) refer to by get lines crossed to proximal measurement to independently get lines crossed to signal power coupling size.Characteristic impedance (ZC) refers to the ratio of cable pair (forward or backwards) voltage wave U and electric current I in the same direction.Return loss (RL) refers to the input reflection power of cable pair and the ratio of input power.

Existing 25 to surpassing 5 class data cables, the stranding subunit structure of many employing 4P+3P+4P+3P+4P+3P+4P is by the stranded rear composition 25P cable of total stranding (P wherein represent twisted wire to), but due to the stranding subunit adopting this structure to need design more than 3 groups different pitches, simultaneously owing to easily producing arrangement dislocation between each stranding subunit, cause twisted wire between cross-talk.Each stranding subunit is subject to mutual extruding when total stranding makes heart yearn deform to cause impedance, echo bad.

Utility model content

The technical assignment of the technical problems to be solved in the utility model and proposition overcomes the not good defect of existing large logarithmic data cable transmission performance, the large logarithmic data cable providing a kind of transmission performance to be improved.

For achieving the above object, large logarithmic data cable of the present utility model, is characterized in that: a center line to around stranded six stranding subunits wrap up oversheath form outside described six stranding subunits;

Described center line is to being form outer wrapping inner sheath at a twisted wire;

Described twisted wire is to being form by two insulated single wires are stranded, and described insulated single wire forms at copper conductor outer wrapping insulating barrier;

Described stranding subunit is made up of four twisted wire strands, forms the insulating barrier that the right insulated single wire of described four twisted wires has different color;

Described six stranding subunits are wound around the colour band of different color.

As optimization technique means: the pitch of described six stranding subunits is two kinds, the pitch of adjacent two stranding subunits is different.

As optimization technique means: the conductor assembly outer diameter of each described stranding subunit is close to the external diameter of described inner sheath.

As optimization technique means: indigo plant-Bai Lan, orange-Bai Cheng, green-Bai are green, palm fibre-Bai palm fibre to being respectively for four twisted wires in described stranding subunit.

The beneficial effects of the utility model are: by being produced by 1+6 structure with 6 stranding subunits by 1 center line, the pitch that two groups different is had in 6 stranding subunits, the different pitch interspersed arrangement mutually when total stranding, effectively can avoid the cross-talk between line pair, stabilize other electric transmission performance, as characteristic impedance, return loss, near-end crosstalk, simplifies production technology.

Accompanying drawing explanation

Fig. 1 is a sectional schematic diagram of the large logarithmic data cable of the utility model;

Fig. 2 is a kind of sectional schematic diagram with the insulated single wire of monochromatic insulating barrier of the utility model;

Fig. 3 is a kind of sectional schematic diagram with the insulated single wire of double-colored insulating barrier of the utility model;

Fig. 4 is the right sectional schematic diagram of a kind of twisted wire of the utility model;

Fig. 5 is the right sectional schematic diagram of the utility model center line;

Fig. 6 is the sectional schematic diagram of the utility model stranding subunit;

Number in the figure illustrates:

01-center line pair;

02-stranding subunit;

03-oversheath;

04-twisted wire pair;

05-inner sheath;

06-insulated single wire, 61-copper conductor, 62-insulating barrier;

07-colour band.

Embodiment

Below in conjunction with Figure of description, the utility model is described further.

As shown in Figure 1, large logarithmic data cable of the present utility model, be a center line to 01 around stranded six stranding subunits 02 wrap up oversheath 03 form outside six stranding subunits;

Center line to 01(see Fig. 5) be at a twisted wire, 04 outer wrapping inner sheath 05 is formed;

Twisted wire to 04(see Fig. 4) be see Fig. 2, Fig. 3 by two insulated single wire 06() strandedly to form, insulated single wire 06 forms at copper conductor 61 outer wrapping insulating barrier 62, represent with double dot dash line the circumscribed circle that twisted wire is right in Fig. 1, Fig. 4, in actual product, this circumscribed circle does not exist;

Stranding subunit 02(is see Fig. 6) to be strandedly made up of 04 four twisted wires, form the insulating barrier that the right insulated single wire of four twisted wires has different color;

Six stranding subunits 02 are wound around the colour band 07 of different color.

The pitch of six stranding subunits 02 is two kinds, and (in cable cabling process, every root/bunch core has straight line and rotates two kinds of motions, and when core rotates a circle, the front vertically air line distance of core is exactly cable pitch for the pitch of adjacent two stranding subunits; The distortion of the larger core of pitch when bending is larger; The pliability of cable is poorer) different.

Conductor assembly outer diameter (the determined external diameter of a circle of cable bundle namely formed after four twisted wire strands of each stranding subunit, this circumscribed circle overlaps with the colour band represented in Fig. 1,6, in actual product, colour band also not in round type, is only signal in figure on section) close to the external diameter of inner sheath.

Indigo plant-Bai Lan, orange-Bai Cheng, green-Bai are green, palm fibre-Bai palm fibre to being respectively for four twisted wires in a stranding subunit.

This programme adopts 8 kinds of chromatograms (blue, orange, green, brown, Bai Lan, Bai Cheng, Bai Lv, in vain palm fibre) when producing, different with 10 kinds of chromatograms (white, red, black, yellow, purple, blue, orange, green, brown, grey) of usual manner, be convenient to production management and enhance productivity, reducing look parent material kind.The insulated single wire that copper conductor adopts the hard copper bar of φ 2.6 to complete data cable by the wire drawing of three series devices, contact annealing, preheating, extrusion molding makes.In extrusion process, produce the insulating barrier of different colours by adding different color masterbatches, for pair twist distribution, as indigo plant join Bai Lan, Bai Cheng joined by orange, greenly join white green, palm fibre and join white palm fibre.

This programme is combined with 4 kinds of b line chromatograms (blue, orange, green, brown) by 4 kinds of a line chromatograms (Bai Lan, Bai Cheng, Bai Lv, in vain palm fibre), and adopt back-twisting twinning machine to produce, compensate for when single line is produced due to concentricity, copper conductor not the factor such as rounding cause the unbalanced and signal reflex of electric capacity etc., guarantee the Stability Analysis of Structures of twisted wire, make the electric properties such as NEXT, Zc, RL meet and be better than standard-required.Simultaneously because of single line employing is the simplest 8 kinds of chromatograms, and two kinds of stranding subunit pitches combinations, decrease the workload that pair twist operation frequently changes pitch, enhance productivity.

This programme adopts the stranding subunit mode of production, and the colour band (band) of each stranding subunit different colours is distinguished, and during convenient construction, line is to differentiation.6 stranding subunits are divided into two groups of different pitches, wherein 3 stranding subunits can be produced by same laying up pitch when stranding is produced, the again easy production of stranding subunit.

This programme center line adopts tubular molding tool to extrude into inner sheath to by PVC sheath material, and inner sheath external diameter is close to stranding subunit conductor assembly outer diameter, and effect is each stranding subunit of isolation, makes cable core more rounding.

Center line is produced by " 1+6 " structure (1P) and 6 stranding subunits (4P) by this programme, has the pitch that two groups different in 6 stranding subunits, and when total stranding, different pitch interts arrangement mutually, effectively can avoid the cross-talk between line pair.This programme adopts small-sized simple lay cabler to complete, and does not need large-scale cabler to produce, and has not only saved production hour but also has made that the structure of total stranding is more stable, the closely effectively displacement of prevention subunit and the generation of NEXT bad phenomenon that causes.

This programme oversheath can adopt 70 or 90 common sheath machines by tubular molding tool extrusion molding oversheath, completes whole oversheath and produces.

Claims (4)

1. large logarithmic data cable, is characterized in that: at a center line, six stranding subunits (02) stranded (01) are around wrapped up to oversheath (03) in described six stranding subunits (02) outside and formed;

Described center line is form (04) outer wrapping inner sheath (05) at a twisted wire to (01);

Described twisted wire is form by two insulated single wires (06) are stranded to (04), and described insulated single wire (06) forms at copper conductor (61) outer wrapping insulating barrier (62);

Described stranding subunit (02) is made up of (04) is stranded four twisted wires, forms the insulating barrier that the right insulated single wire of described four twisted wires has different color;

The upper colour band (07) being wound around different color of described six stranding subunits (02).

2. large logarithmic data cable according to claim 1, is characterized in that: the pitch of described six stranding subunits (02) is two kinds, and the pitch of adjacent two stranding subunits is different.

3. large logarithmic data cable according to claim 1, is characterized in that: the conductor assembly outer diameter of each described stranding subunit (02) is close to the external diameter of described inner sheath (05).

4. large logarithmic data cable according to claim 1, is characterized in that: indigo plant-Bai Lan, orange-Bai Cheng, green-Bai are green, palm fibre-Bai palm fibre to being respectively for four twisted wires in described stranding subunit.